Katana
Wallet-sized Carbon Fiber Ice Scraper
Katana launched on January 10, 2018 with 3 votes. The site was not reachable when checked in September 2026.
What it does
Katana is an ice scraper for your wallet. As a bonus, it's made of carbon fiber. It's 10 times as rigid as a credit card, and it's just an awesome thing to have in your wallet. It's also just $5.
Does a similar job
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I built a knife steel comparison tool2025 · new.knife.day · ▲146Hey HN! I'm a bit of a knife steel geek and got tired of juggling tabs to compare stats. So, I built this tool: https://new.knife.day/blog/knife-steel-comparisons/all It lets you pick steels (like the ones in the screenshot) and see a radar chart comparing their edge retention, toughness, corrosion resistance, and ease of sharpening on a simple 1-10 scale. It's already been super handy for me, and I thought fellow knife/metallurgy enthusiasts here might find it useful too. Would love to hear your thoughts or any steel requests! Cheers!
- KOKnifeGeek – Online Database of Pocket Knives2023 · knifegeek.io · ▲140
Hey HN! About a year ago i stumbled upon the world of swords, knives, and EDC gear. A weirdly addicting (and expensive) hobby to have. Back then i noticed something, it was quite tedious to easily sift and search through knives based on length, steel, brand, and what not to find the knife for me. There were some great youtube channels that helped me pick out what i wanted however i had to sit through multiple 30 minute videos just to review 10-15 knives or so each. Recently i've been having a little trouble sleeping so i decided to pickup a new passion project to work on late at night,…
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